1
2
3
4
5
100

nyct/o

night

100

orbit/o

eye socket

100

phon/o 

sound

100

sapling/o

Eustachian (auditory) tube; fallopian tube

100

ton/o

tone; tension

200

ocul/o

eye

200

ossic/o

ossicle (small bone)

200

phot/o 

light

200

scot/o

darkness

200

tympan/o

eardrum

300

olfact/o

smell

300

ot/o

ear

300

presby/o

old age

300

staped/o

stapes (middle ear bone)

300

vestibul/o

vestibule

400

ophthalm/o

eye

400

papill/o

optic disc; nipple-like

400

retin/o

retina

400

steat/o

sebum; fat

400

vitr/o

vitreous body

500

opt/o, optic/o

eye; vision

500

phac/o, phak/o

lens of the eye

500

rhin/o

nose

500

stigmat/o

point

500

vitre/o

glassy